Development reports · Mercer County, NJ
What's being built in Mercer County, NJ: Q3 2026
11 development projects in Mercer County, NJ had a new filing in Q3 2026 (July to September), up from 8 in Q2 and 12 in Q3 2025. Together they propose 154,403 sq ft of non-residential space, roughly $25.8M in estimated construction value. The busiest towns were West Windsor Township (4), Robbinsville Township (3) and Hamilton Township (2). The most common project type was apartments, followed by office.
11projects filed
0new homes proposed
154,403sq ft non-residential
$25.8Mest. construction value
Biggest projects
Filed 2026-08-05
$13.0M est. value
100,000 sq ft|Warehouse & storage
Storage building, Block 2173, Lot 15.01
Hamilton Township, Mercer County, NJ
Filed 2026-08-24
$3.5M est. value
17,280 sq ft|Office
1202 Route 130
Robbinsville Township, Mercer County, NJ
Filed 2026-07-16
$3.9M est. value
11,184 sq ft|Institutional
Day care facility, 100-200 Farber Road
West Windsor Township, Mercer County, NJ
Filed 2026-08-06
$2.0M est. value
10,000 sq ft|Other
Accessory structure, Block 37 Lot 5.02
Robbinsville Township, Mercer County, NJ
Filed 2026-09-10
$1.9M est. value
9,720 sq ft|Office
Herbert Ave business building
Hamilton Township, Mercer County, NJ
Filed 2026-09-18
$607K est. value
3,035 sq ft|Recreation
Outdoor grandstand structure, Block 3, Lot 1.0113
West Windsor Township, Mercer County, NJ
By type
| Type | Projects | Homes | Sq ft |
|---|---|---|---|
| Apartments | 3 | 0 | 0 |
| Other | 2 | 0 | 10,600 |
| Office | 2 | 0 | 27,000 |
| Institutional | 2 | 0 | 13,768 |
| Recreation | 1 | 0 | 3,035 |
| Warehouse & storage | 1 | 0 | 100,000 |
By town
| Town | Projects | Homes |
|---|---|---|
| West Windsor Township | 4 | 0 |
| Robbinsville Township | 3 | 0 |
| Hamilton Township | 2 | 0 |
| Ewing Township | 1 | 0 |
| Hopewell Township | 1 | 0 |
Every project filed in Q3 2026
| Received | Project | Town | Type | Homes | Sq ft |
|---|---|---|---|---|---|
| 2026-09-28 | Airport accessory structures, Ewing Township | Ewing Township | Other | 600 | |
| 2026-09-18 | Outdoor grandstand structure, Block 3, Lot 1.0113 | West Windsor Township | Recreation | 3,035 | |
| 2026-09-17 | 5+ family buildings, 3101 Jacob Francis Way | Hopewell Township | Apartments | ||
| 2026-09-10 | Herbert Ave business building | Hamilton Township | Office | 9,720 | |
| 2026-08-31 | Multifamily building, Block 6.30 Lot 5.01 | West Windsor Township | Apartments | ||
| 2026-08-24 | Multifamily building, Block 6.30, Lot 1.01 | West Windsor Township | Apartments | ||
| 2026-08-24 | 1202 Route 130 | Robbinsville Township | Office | 17,280 | |
| 2026-08-06 | Accessory structure, Block 37 Lot 5.02 | Robbinsville Township | Other | 10,000 | |
| 2026-08-05 | Storage building, Block 2173, Lot 15.01 | Hamilton Township | Warehouse & storage | 100,000 | |
| 2026-07-16 | Day care facility, 100-200 Farber Road | West Windsor Township | Institutional | 11,184 | |
| 2026-07-16 | Assembly-use building, Block 26 Lot 6.05 | Robbinsville Township | Institutional | 2,584 |
← Q2 2026 · All Mercer County reports
Counted by each project's latest filing date. Figures are the totals filed with the county and state, and construction values are rough estimates. See the Mercer County page for every project since 2024.